Oneup components dropper post not returning fully

I've had a Oneup components dropper post for about 3 months and in the last week it won't return to full extension.I've done a full service as per the Oneup components website.Has anyone else had this happen to them? If so, what was the solution?

I've had a Oneup components dropper post for about 3 months and in the last week it won't return to full extension.I've done a full service as per the Oneup components website.Has anyone else had this happen to them? If so, what was the solution?

Many thanks

Dom

I had the same thing happen after about three months. I found that it only had about 150 psi when they recommend 250 - 300 psi. I bumped it up to 275 and it's back in action. I'm going to keep an eye on it to see if it loses any pressure going forward. Good luck!

Hi I have a warranty replacement OneUp Dropper 170mm, working perfectly with a WolfTooth Remote. A few months ago it stopped fully returning. I tried everything below, and found the white bush under the collar was too tight. Popped it up, removed it from the shaft and had full return. Lightly sanded it inside and out until it went in smooth, regreased and refit. Hasn't happened since.

-Isolate actuator from lever - remove cable, ferrule, test manually.[-Don't let the o-ring and metal part drop down your cable into frame, you'll need to feed the housing up and nearly out to retrieve them.]

-Pull it apart for a service/ inspection - done - was the upper white bush tight?? That is all I found wrong with mine.

Same issue after a month of owning, even when properly pressurized, proper cable tension and seat-post collar torque. I had them send me a warranty replacement, I am not opening up a month old post to do a service or sanding anything thats crazy.

I had the same with mine and it was the cable routing. Because the outer moves, not the inner, it can be an issue if the routing is tight. Apparently lots of SC owners have had problems due to this. Mine is the V1 by the way.

So my OneUp won't fully extend. Stripped it down regreased it, upon reassembly it all slides up and down freely until the top collar goes on.

The white bush looks fine, no signs of wear but it is very difficult to get back in the outer tube. Once in and the collar tightened the post is very sticky and tight, even at 300psi.

Are collars available separately? Damn post is doing my head in, it's been more trouble than a used Reverb wishing I'd never bought it.

2 thoughts :-I've noticed that the position (rotation) of the white collar can help or on the opposite increase this issue. Try to rotate it. - I might sand it very gently at some point with 600 or higher sand paper. I guess it is just a matter of a few microns and / or perfect homogeneity of the surface. If you try this, be gentle, and only sand the external surface of the collar (the one that will not move during seatpost activation)

2 thoughts :-I've noticed that the position (rotation) of the white collar can help or on the opposite increase this issue. Try to rotate it. - I might sand it very gently at some point with 600 or higher sand paper. I guess it is just a matter of a few microns and / or perfect homogeneity of the surface. If you try this, be gentle, and only sand the external surface of the collar (the one that will not move during seatpost activation)

I did try a few random rotational angles but nothing scientific, perhaps it has an imperceptible worn spot and needs to go back the right way.

I had considered a bit of abrasion, but it would be very difficult in my garage to do anything accurate, but yes good plan about only attacking the outside surface, I shall have a tinker and report back...